Tambour-frame-driving mechanism.



J. GRANZ.

TAMBOUR FRAME DRIVING MECHANISM.

APPLICATION FILED JUNE 4. 9H.

Patented Sept. 19, 1916.

Qwuemtoz $51 6 J41 Wm m: Norms Ina-ts qm. Pnomurmz. Iusmncmu. u, c

"" nrrnn srarns Parana critics.

JOSEF GRAN'Z, 0F PLAUEN, GERMANY, ASSIGNOR TO VOGTLANDISCHE MASCHINEN- FABRIK, 0F PLAUEN, GERMANY.

Specification of Letters Patent. I

Patented Sept. 19, 1916.

Application filed June 4, 1914. Serial No. 842,904.

To all whom it may concern:

Be it known that I, Josnr GRANZ, a subject of the German Emperor, residing at Plauen, in Vogtland, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Tambour- Frame-Driving Mechanism, of which the following is a specification.

The present invention relates to driving mechanism for tamhour frames in embroidering machines. WVith large embroidering machines such as the modern 1% yd. machines the tambour frame has the tendency to become distorted from its rectangular shape during the rapid movement thereof, when as heretofore the driving force acts against a single point of the tambour frame. To obviate this tendency various means have been introduced without, however, any satsisfactory result.

The object of this invention is to provide eflicient means for transmitting movement to the tamhour frame so that the latter will, irrespective of its length and speed, always maintain its proper shape.

To render my invention more clear, one embodiment thereof is illustrated in the accompanying drawing, in which similar reference cha 'acters denote correspondingparts and which in a more or less diagrammatic View shows an automatic emhroidering ma chine equipped with the new means for transmitting horizontal movement to the tambour frame.

Referring to the drawing 1 denotes the jacquard mechanism or automat which as usual controls the movement of the tambour frame 2 through the medium of vertical and horizontal shafts 3, 4, the free ends of which carry or are formed with gears 3, 4: These gears in well known manner transmit motion to horizontal and vertical slides 5, 6. For the transmission of horizontal movement two horizontal slides 5, 5 are provided of which each is formed at one end with a vertical loop 5, 5 engaging members 7, 7 in form of blocks or the like projecting from the tambour frame. The projecting members are arranged one at the upper side and the other at the lower side of the tainbour frame. The slide 5 at its opposite end is formed to a rack in the same manner as the upper slide 5 to mesh with a pinion or gear 8 carried by or formed on an auxiliary shaft 9 arranged parallel to the vertical shaft 3 and receiving motion from the latter through the medium of two intermeshing gears 10, 11, of which 10 is carried by the shaft 3 and 11 by the shaft 9.

What I claim and desire to secure by Letters Patent is:

1. In an embroidering machine, the combination with the tamhour frame, of at least two projections on said frame near the upper and lower sides thereof, horizontally movable vertical loops engaging said projections, a jacquard mechanism including vertical shafts, means for transmitting mo tion from one shaft to the other and means for transmitting motion from said shafts to said vertical loops.

2. In an embroidering machine, the combination with the tambour frame, of at least two projections on said frame near the upper and lower sides thereof, horizontal slides formed at one end with vertical loops engaging said projections and at their opposite ends with racksand a jacquard mechanism including vertical shafts, means for transmitting movement from one shaft to the other and pinions on said shafts meshing with the racks of said slides.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEF GRANZ.

Witnesses:

ROBERT BEYMANN, ROBERT H. NIER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

